Don't show media controls when there is a persistent video.

third_party/WebKit/Source/web/WebSettingsImpl.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 189 matching lines @@
   void setViewportMetaNonUserScalableQuirk(bool) override;
   void setViewportMetaZeroValuesQuirk(bool) override;
   void setWebGLErrorsToConsoleEnabled(bool) override;
   void setWebSecurityEnabled(bool) override;
   void setWideViewportQuirkEnabled(bool) override;
   void setXSSAuditorEnabled(bool) override;
   void setExpensiveBackgroundThrottlingCPUBudget(float) override;
   void setExpensiveBackgroundThrottlingInitialBudget(float) override;
   void setExpensiveBackgroundThrottlingMaxBudget(float) override;
   void setExpensiveBackgroundThrottlingMaxDelay(float) override;
+  void setMediaControlsEnabled(bool) override;
 
   bool showFPSCounter() const { return m_showFPSCounter; }
   bool showPaintRects() const { return m_showPaintRects; }
   bool renderVSyncNotificationEnabled() const {
     return m_renderVSyncNotificationEnabled;
   }
   bool autoZoomFocusedNodeToLegibleScale() const {
     return m_autoZoomFocusedNodeToLegibleScale;
   }
   bool doubleTapToZoomEnabled() const;
@@ skipping 51 matching lines @@
   bool m_clobberUserAgentInitialScaleQuirk;
   float m_expensiveBackgroundThrottlingCPUBudget;
   float m_expensiveBackgroundThrottlingInitialBudget;
   float m_expensiveBackgroundThrottlingMaxBudget;
   float m_expensiveBackgroundThrottlingMaxDelay;
 };
 
 }  // namespace blink
 
 #endif